Inhomogeneous cosmology and backreaction: Current status and future prospects
Astronomical observations reveal hierarchical structures in the universe, from galaxies, groups of galaxies, clusters and superclusters, to filaments and voids. On the largest scales, it seems that some kind of statistical homogeneity can be observed. As a result, modern cosmological models are based on spatially homogeneous and isotropic solutions of the Einstein equations, and the evolution of the universe is approximated by the Friedmann equations. In parallel to standard homogeneous cosmology, the field of inhomogeneous cosmology and backreaction is being developed. This field investigates whether small scale inhomogeneities via nonlinear effects can backreact and alter the properties of the universe on its largest scales, leading to a non-Friedmannian evolution. This paper presents the current status of inhomogeneous cosmology and backreaction. It also discusses future prospects of the field of inhomogeneous cosmology, which is based on a survey of 50 academics working in the field of inhomogeneous cosmology.
Funding
Australian Research Council
History
Publication title
International Journal of Modern Physics DVolume
26Issue
6Article number
1730011Number
1730011ISSN
0218-2718Department/School
School of Natural SciencesPublisher
World Scientific Publ Co Pte LtdPlace of publication
Journal Dept Po Box 128 Farrer Road, Singapore, Singapore, 912805Rights statement
Preprint of an article published in International journal of modern physics D, 26(1), 2017, 1730011, DOI: 10.1142/S0218271817300117 © copyright World Scientific Publishing Company https://www.worldscientific.com/worldscinet/ijmpdRepository Status
- Open